Planck's radiation law

noun Physics.
  1. the law that energy associated with electromagnetic radiation, as light, is composed of discrete quanta of energy, each quantum equal to Planck's constant times the corresponding frequency of the radiation: the fundamental law of quantum mechanics.
  2. the law giving the spectral distribution of radiation from a blackbody.

Origin of Planck's radiation law

First recorded in 1905–10; named after M. K. E. Planck
Also called Planck radiation formula, Planck's law.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018